$ git clone -n https://src.fedoraproject.org/rpms/rust-bimap.git /var/lib/mock/f41-build-side-1-3110241-39405/root/chroot_tmpdir/scmroot/rust-bimap
Cloning into '/var/lib/mock/f41-build-side-1-3110241-39405/root/chroot_tmpdir/scmroot/rust-bimap'...
$ git fetch origin 5422905e12546c14176010726b2dccf8dc6aeeb3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bimap
 * [new ref]         5422905e12546c14176010726b2dccf8dc6aeeb3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5422905 Initial commit