$ git clone -n https://src.fedoraproject.org/rpms/pdfcrack.git /var/lib/mock/f45-build-21486-586/root/chroot_tmpdir/scmroot/pdfcrack
Cloning into '/var/lib/mock/f45-build-21486-586/root/chroot_tmpdir/scmroot/pdfcrack'...
$ git fetch origin 1168368cdc9591da2c5281706152cbaa838c2f73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdfcrack
 * [new ref]         1168368cdc9591da2c5281706152cbaa838c2f73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1168368 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild