$ git clone -n https://src.fedoraproject.org/rpms/jumpnbump.git /var/lib/mock/f40-build-2005300-45055/root/chroot_tmpdir/scmroot/jumpnbump
Cloning into '/var/lib/mock/f40-build-2005300-45055/root/chroot_tmpdir/scmroot/jumpnbump'...
$ git fetch origin 0556d25b444c25e57ad41cb95bba84a55036a16d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jumpnbump
 * [new ref]         0556d25b444c25e57ad41cb95bba84a55036a16d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0556d25 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild