$ git clone -n https://src.fedoraproject.org/rpms/mactel-boot.git /var/lib/mock/f39-build-2550474-61915/root/chroot_tmpdir/scmroot/mactel-boot
Cloning into '/var/lib/mock/f39-build-2550474-61915/root/chroot_tmpdir/scmroot/mactel-boot'...
$ git fetch origin 87796edef1a6aef30bb23b889c4d3c7476e776bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mactel-boot
 * [new ref]         87796edef1a6aef30bb23b889c4d3c7476e776bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87796ed Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild