$ git clone -n https://src.fedoraproject.org/rpms/rust-procfs.git /var/lib/mock/f39-build-2203215-51909/root/chroot_tmpdir/scmroot/rust-procfs
Cloning into '/var/lib/mock/f39-build-2203215-51909/root/chroot_tmpdir/scmroot/rust-procfs'...
$ git fetch origin 21b213fc236740177659be1def71dc5b3fa78624:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-procfs
 * [new ref]         21b213fc236740177659be1def71dc5b3fa78624 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21b213f Add license files