$ git clone -n https://src.fedoraproject.org/rpms/stomppy.git /var/lib/mock/f38-build-side-42-init-devel-735610-27633/root/chroot_tmpdir/scmroot/stomppy
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-735610-27633/root/chroot_tmpdir/scmroot/stomppy'...
$ git fetch origin 6e71f02fbcba32b17e3feca45063539f47e22f40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stomppy
 * [new ref]         6e71f02fbcba32b17e3feca45063539f47e22f40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e71f02 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild