$ git clone -n https://src.fedoraproject.org/rpms/rust-docker_credential.git /var/lib/mock/f42-build-side-1-3585171-46903/root/chroot_tmpdir/scmroot/rust-docker_credential
Cloning into '/var/lib/mock/f42-build-side-1-3585171-46903/root/chroot_tmpdir/scmroot/rust-docker_credential'...
$ git fetch origin ed7437df49a7d8f07fb626abfa1e56236f8a49ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-docker_credential
 * [new ref]         ed7437df49a7d8f07fb626abfa1e56236f8a49ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed7437d Update to version 1.3.2; Fixes RHBZ#2363959