$ git clone -n https://src.fedoraproject.org/rpms/golang-x-crypto.git /var/lib/mock/f38-build-side-42-init-devel-693630-26939/root/chroot_tmpdir/scmroot/golang-x-crypto
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-693630-26939/root/chroot_tmpdir/scmroot/golang-x-crypto'...
$ git fetch origin ea5374569048acb1f2b233a37a595653c9a35b2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-crypto
 * [new ref]         ea5374569048acb1f2b233a37a595653c9a35b2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea53745 Update to latest version (#2173325)