$ git clone -n https://src.fedoraproject.org/rpms/qm.git /var/lib/mock/f39-build-1648825-40450/root/chroot_tmpdir/scmroot/qm
Cloning into '/var/lib/mock/f39-build-1648825-40450/root/chroot_tmpdir/scmroot/qm'...
$ git fetch origin d64c53f9db3252ff309b0851fdc1406914e9aba4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qm
 * [new ref]         d64c53f9db3252ff309b0851fdc1406914e9aba4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d64c53f [packit] 0.5.8 upstream release