$ git clone -n https://src.fedoraproject.org/rpms/bcel.git /var/lib/mock/f38-build-side-42-init-devel-604067-26225/root/chroot_tmpdir/scmroot/bcel
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-604067-26225/root/chroot_tmpdir/scmroot/bcel'...
$ git fetch origin 0542278fc4879b8b775c0c73a1a708ffc96ce8f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcel
 * [new ref]         0542278fc4879b8b775c0c73a1a708ffc96ce8f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0542278 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild