$ git clone -n https://src.fedoraproject.org/rpms/rust-filedescriptor.git /var/lib/mock/f38-build-side-43-rust-devel-1412502-31443/root/chroot_tmpdir/scmroot/rust-filedescriptor
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412502-31443/root/chroot_tmpdir/scmroot/rust-filedescriptor'...
$ git fetch origin ed1a25840f0626c9c878c481e99f0692f9f15670:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-filedescriptor
 * [new ref]         ed1a25840f0626c9c878c481e99f0692f9f15670 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed1a258 Regenerate with rust2rpm v24 and add missing license file