$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-resclasses.git /var/lib/mock/f40-build-1997230-44115/root/chroot_tmpdir/scmroot/gap-pkg-resclasses
Cloning into '/var/lib/mock/f40-build-1997230-44115/root/chroot_tmpdir/scmroot/gap-pkg-resclasses'...
$ git fetch origin e3db49a2ba03da677d421bfc02cba3d8682e4ba3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-resclasses
 * [new ref]         e3db49a2ba03da677d421bfc02cba3d8682e4ba3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3db49a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild