$ git clone -n https://src.fedoraproject.org/rpms/libtool.git /var/lib/mock/f40-build-775868-128471/root/chroot_tmpdir/scmroot/libtool
Cloning into '/var/lib/mock/f40-build-775868-128471/root/chroot_tmpdir/scmroot/libtool'...
$ git fetch origin c9b17ee0351a9c25b03ac7b39418455ac331eecd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtool
 * [new ref]         c9b17ee0351a9c25b03ac7b39418455ac331eecd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9b17ee 2.4.7-9