$ git clone -n https://src.fedoraproject.org/rpms/cbootimage.git /var/lib/mock/f40-build-1992352-43590/root/chroot_tmpdir/scmroot/cbootimage
Cloning into '/var/lib/mock/f40-build-1992352-43590/root/chroot_tmpdir/scmroot/cbootimage'...
$ git fetch origin fe2634bc0d52f1388f83f26f8aef2f43cb4cd134:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cbootimage
 * [new ref]         fe2634bc0d52f1388f83f26f8aef2f43cb4cd134 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe2634b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild