$ git clone -n https://src.fedoraproject.org/rpms/chayang.git /var/lib/mock/f40-build-755860-118346/root/chroot_tmpdir/scmroot/chayang
Cloning into '/var/lib/mock/f40-build-755860-118346/root/chroot_tmpdir/scmroot/chayang'...
$ git fetch origin a4344b48f778a8e712d0e58213116df9f2ea4972:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chayang
 * [new ref]         a4344b48f778a8e712d0e58213116df9f2ea4972 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4344b4 Initial packaging (fedora#2239511)