$ git clone -n https://src.fedoraproject.org/rpms/hcloud.git /var/lib/mock/f40-build-2386676-60496/root/chroot_tmpdir/scmroot/hcloud
Cloning into '/var/lib/mock/f40-build-2386676-60496/root/chroot_tmpdir/scmroot/hcloud'...
$ git fetch origin ab7645c9129941d21132b068cf0aef3570a60356:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hcloud
 * [new ref]         ab7645c9129941d21132b068cf0aef3570a60356 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab7645c Bump revision number