$ git clone -n https://src.fedoraproject.org/rpms/libjcat.git /var/lib/mock/f45-build-16403-486/root/chroot_tmpdir/scmroot/libjcat
Cloning into '/var/lib/mock/f45-build-16403-486/root/chroot_tmpdir/scmroot/libjcat'...
$ git fetch origin e32f724f8dc4a0b79410fa5fb69f550cd6af81dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libjcat
 * [new ref]         e32f724f8dc4a0b79410fa5fb69f550cd6af81dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e32f724 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild