$ git clone -n https://src.fedoraproject.org/rpms/libvirt.git /var/lib/mock/f41-build-side-1-2931051-35132/root/chroot_tmpdir/scmroot/libvirt
Cloning into '/var/lib/mock/f41-build-side-1-2931051-35132/root/chroot_tmpdir/scmroot/libvirt'...
$ git fetch origin 4f3b8e6a1789a8fe92035b4ca56da6c0623699e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt
 * [new ref]         4f3b8e6a1789a8fe92035b4ca56da6c0623699e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f3b8e6 libvirt-10.6.0-5