$ git clone -n https://src.fedoraproject.org/rpms/rust-ahash0.7.git /var/lib/mock/f39-build-1527132-36130/root/chroot_tmpdir/scmroot/rust-ahash0.7
Cloning into '/var/lib/mock/f39-build-1527132-36130/root/chroot_tmpdir/scmroot/rust-ahash0.7'...
$ git fetch origin ad1579c39dd6343760dd8c3835c1615f305cd936:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ahash0.7
 * [new ref]         ad1579c39dd6343760dd8c3835c1615f305cd936 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad1579c Update to version 0.7.7