$ git clone -n https://src.fedoraproject.org/rpms/rust-cipher.git /var/lib/mock/f38-build-side-43-rust-devel-1412280-31440/root/chroot_tmpdir/scmroot/rust-cipher
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412280-31440/root/chroot_tmpdir/scmroot/rust-cipher'...
$ git fetch origin ab4d37240387d62570a0fc189a9bf5be9d772516:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cipher
 * [new ref]         ab4d37240387d62570a0fc189a9bf5be9d772516 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab4d372 Update to version 0.4.4; Fixes RHBZ#2176696