$ git clone -n https://src.fedoraproject.org/rpms/prooftree.git /var/lib/mock/f41-build-811410-147385/root/chroot_tmpdir/scmroot/prooftree
Cloning into '/var/lib/mock/f41-build-811410-147385/root/chroot_tmpdir/scmroot/prooftree'...
$ git fetch origin b55bbb0a15d3fe2a33026333d2bac8030151e5aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/prooftree
 * [new ref]         b55bbb0a15d3fe2a33026333d2bac8030151e5aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b55bbb0 OCaml 5.2.0 for Fedora 41