$ git clone -n https://src.fedoraproject.org/rpms/guestfs-tools.git /var/lib/mock/f42-build-866037-173661/root/chroot_tmpdir/scmroot/guestfs-tools
Cloning into '/var/lib/mock/f42-build-866037-173661/root/chroot_tmpdir/scmroot/guestfs-tools'...
$ git fetch origin 2d83c6c39859904ab25a18886ea0deeb3a5fedcb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guestfs-tools
 * [new ref]         2d83c6c39859904ab25a18886ea0deeb3a5fedcb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d83c6c OCaml 5.3.0 rebuild for Fedora 42