$ git clone -n https://src.fedoraproject.org/rpms/rust-memo-map.git /var/lib/mock/f45-build-43246-801/root/chroot_tmpdir/scmroot/rust-memo-map
Cloning into '/var/lib/mock/f45-build-43246-801/root/chroot_tmpdir/scmroot/rust-memo-map'...
$ git fetch origin 3e3d72a8e6ecd978144060f3449f7b6ea7645d3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-memo-map
 * [new ref]         3e3d72a8e6ecd978144060f3449f7b6ea7645d3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e3d72a Update to version 0.3.4; Fixes RHBZ#2527908