$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-autoconf.git /var/lib/mock/f41-build-808019-145593/root/chroot_tmpdir/scmroot/perl-Alien-autoconf
Cloning into '/var/lib/mock/f41-build-808019-145593/root/chroot_tmpdir/scmroot/perl-Alien-autoconf'...
$ git fetch origin 3cfb7cd67348aeb250c8f8ed6ce7ae3af61dce24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-autoconf
 * [new ref]         3cfb7cd67348aeb250c8f8ed6ce7ae3af61dce24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cfb7cd 0.20 bump