$ git clone -n https://src.fedoraproject.org/rpms/crontabs.git /var/lib/mock/f40-build-2209070-52150/root/chroot_tmpdir/scmroot/crontabs
Cloning into '/var/lib/mock/f40-build-2209070-52150/root/chroot_tmpdir/scmroot/crontabs'...
$ git fetch origin a69f8fa175d52f18d15ddc6e886f9547ed7ae472:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crontabs
 * [new ref]         a69f8fa175d52f18d15ddc6e886f9547ed7ae472 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a69f8fa Migrate to rpmautospec and current versioning guidelines