$ git clone -n https://src.fedoraproject.org/rpms/obsctl.git /var/lib/mock/f45-build-20429-570/root/chroot_tmpdir/scmroot/obsctl
Cloning into '/var/lib/mock/f45-build-20429-570/root/chroot_tmpdir/scmroot/obsctl'...
$ git fetch origin 969de8b335f973fe689cfd238024715aeab9bf25:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/obsctl
 * [new ref]         969de8b335f973fe689cfd238024715aeab9bf25 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 969de8b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild