$ git clone -n https://src.fedoraproject.org/rpms/rust-ecb.git /var/lib/mock/f45-build-41405-782/root/chroot_tmpdir/scmroot/rust-ecb
Cloning into '/var/lib/mock/f45-build-41405-782/root/chroot_tmpdir/scmroot/rust-ecb'...
$ git fetch origin 672623ad21e90514fade8a240854159593f5ef34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ecb
 * [new ref]         672623ad21e90514fade8a240854159593f5ef34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 672623a Update to version 0.2.1; Fixes RHBZ#2521010