$ git clone -n https://src.fedoraproject.org/rpms/librep.git /var/lib/mock/f40-build-786348-134218/root/chroot_tmpdir/scmroot/librep
Cloning into '/var/lib/mock/f40-build-786348-134218/root/chroot_tmpdir/scmroot/librep'...
$ git fetch origin 4c03ac02923a7b17f05ec6ec8d0d8925776385e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librep
 * [new ref]         4c03ac02923a7b17f05ec6ec8d0d8925776385e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c03ac0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild