$ git clone -n https://src.fedoraproject.org/rpms/rust-equivalent.git /var/lib/mock/f38-build-side-43-rust-devel-1412071-31437/root/chroot_tmpdir/scmroot/rust-equivalent
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412071-31437/root/chroot_tmpdir/scmroot/rust-equivalent'...
$ git fetch origin 6c7d0bb130b09ba54e3d34f1112e265261f37ce1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-equivalent
 * [new ref]         6c7d0bb130b09ba54e3d34f1112e265261f37ce1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c7d0bb Update to version 1.0.1; Fixes RHBZ#2221809