$ git clone -n https://src.fedoraproject.org/rpms/xmlstarlet.git /var/lib/mock/f45-build-38965-730/root/chroot_tmpdir/scmroot/xmlstarlet
Cloning into '/var/lib/mock/f45-build-38965-730/root/chroot_tmpdir/scmroot/xmlstarlet'...
$ git fetch origin d434040f6ea3dc7f9b1eb947382aca7dc39a2d96:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmlstarlet
 * [new ref]         d434040f6ea3dc7f9b1eb947382aca7dc39a2d96 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d434040 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild