$ git clone -n https://src.fedoraproject.org/rpms/rust-users0.10.git /var/lib/mock/f42-build-3251810-41222/root/chroot_tmpdir/scmroot/rust-users0.10
Cloning into '/var/lib/mock/f42-build-3251810-41222/root/chroot_tmpdir/scmroot/rust-users0.10'...
$ git fetch origin 51d8a88cc45d792e1b2409df17fdba531f55a61f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-users0.10
 * [new ref]         51d8a88cc45d792e1b2409df17fdba531f55a61f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51d8a88 unmaintained and insecure - superseded by uzers