$ git clone -n https://src.fedoraproject.org/rpms/xtb.git /var/lib/mock/f45-build-39132-732/root/chroot_tmpdir/scmroot/xtb
Cloning into '/var/lib/mock/f45-build-39132-732/root/chroot_tmpdir/scmroot/xtb'...
$ git fetch origin 3cc9a539e951e7ad4bb3312ad15afd9daa852cb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xtb
 * [new ref]         3cc9a539e951e7ad4bb3312ad15afd9daa852cb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cc9a53 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild