$ git clone -n https://src.fedoraproject.org/rpms/rust-image-extras.git /var/lib/mock/f45-build-45137-821/root/chroot_tmpdir/scmroot/rust-image-extras
Cloning into '/var/lib/mock/f45-build-45137-821/root/chroot_tmpdir/scmroot/rust-image-extras'...
$ git fetch origin e7e17e8d000be4d137fb26c4e7afb2e2069c6c17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-image-extras
 * [new ref]         e7e17e8d000be4d137fb26c4e7afb2e2069c6c17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7e17e8 Update to version 0.1.1; Fixes RHBZ#2464606