$ git clone -n https://src.fedoraproject.org/rpms/rust-tendril.git /var/lib/mock/f39-build-1445385-32652/root/chroot_tmpdir/scmroot/rust-tendril
Cloning into '/var/lib/mock/f39-build-1445385-32652/root/chroot_tmpdir/scmroot/rust-tendril'...
$ git fetch origin b8ff3fa1e01ccb3d2903ece0331cfcbb0a267fae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tendril
 * [new ref]         b8ff3fa1e01ccb3d2903ece0331cfcbb0a267fae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8ff3fa Regenerate with rust2rpm v24