$ git clone -n https://src.fedoraproject.org/rpms/rust-drm-sys.git /var/lib/mock/f39-build-1685238-41074/root/chroot_tmpdir/scmroot/rust-drm-sys
Cloning into '/var/lib/mock/f39-build-1685238-41074/root/chroot_tmpdir/scmroot/rust-drm-sys'...
$ git fetch origin 18013c05b0e7be66b39d2d05119447f2d8ae7131:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-drm-sys
 * [new ref]         18013c05b0e7be66b39d2d05119447f2d8ae7131 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18013c0 Initial import; Fixes: RHBZ#2224814