$ git clone -n https://src.fedoraproject.org/rpms/elfio.git /var/lib/mock/f45-build-8018-372/root/chroot_tmpdir/scmroot/elfio
Cloning into '/var/lib/mock/f45-build-8018-372/root/chroot_tmpdir/scmroot/elfio'...
$ git fetch origin b48c4a40a2310f2b437183ccee9a50fe934c04cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elfio
 * [new ref]         b48c4a40a2310f2b437183ccee9a50fe934c04cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b48c4a4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild