$ git clone -n https://src.fedoraproject.org/rpms/ocaml-astring.git /var/lib/mock/f39-build-2479871-61579/root/chroot_tmpdir/scmroot/ocaml-astring
Cloning into '/var/lib/mock/f39-build-2479871-61579/root/chroot_tmpdir/scmroot/ocaml-astring'...
$ git fetch origin 1543f365b1c1fc72c1cf03f6824222d60dda7c93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-astring
 * [new ref]         1543f365b1c1fc72c1cf03f6824222d60dda7c93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1543f36 Bump and rebuild