$ git clone -n https://src.fedoraproject.org/rpms/librepository.git /var/lib/mock/f40-build-2672706-67538/root/chroot_tmpdir/scmroot/librepository
Cloning into '/var/lib/mock/f40-build-2672706-67538/root/chroot_tmpdir/scmroot/librepository'...
$ git fetch origin 543b8c3b5884e62e2c3a360f8a03edff855a9e2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librepository
 * [new ref]         543b8c3b5884e62e2c3a360f8a03edff855a9e2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 543b8c3 Rebuilt for java-21-openjdk as system jdk