$ git clone -n https://src.fedoraproject.org/rpms/virt-what.git /var/lib/mock/f41-build-847716-164042/root/chroot_tmpdir/scmroot/virt-what
Cloning into '/var/lib/mock/f41-build-847716-164042/root/chroot_tmpdir/scmroot/virt-what'...
$ git fetch origin a52ce05b966b18e35e155c3134901b45ade2c033:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/virt-what
 * [new ref]         a52ce05b966b18e35e155c3134901b45ade2c033 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a52ce05 New upstream version 1.27