$ git clone -n https://src.fedoraproject.org/rpms/rust-uucore.git /var/lib/mock/f39-build-2199436-51741/root/chroot_tmpdir/scmroot/rust-uucore
Cloning into '/var/lib/mock/f39-build-2199436-51741/root/chroot_tmpdir/scmroot/rust-uucore'...
$ git fetch origin a11b4995f9f20f14b59d2c6a51c9a926f4195796:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uucore
 * [new ref]         a11b4995f9f20f14b59d2c6a51c9a926f4195796 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a11b499 Update to 0.0.23