$ git clone -n https://src.fedoraproject.org/rpms/rust-svgtypes.git /var/lib/mock/f41-build-side-1-3134941-39764/root/chroot_tmpdir/scmroot/rust-svgtypes
Cloning into '/var/lib/mock/f41-build-side-1-3134941-39764/root/chroot_tmpdir/scmroot/rust-svgtypes'...
$ git fetch origin 26a61e4df1aa700af794a053e654f965b13bbf52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-svgtypes
 * [new ref]         26a61e4df1aa700af794a053e654f965b13bbf52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26a61e4 unused leaf package for more than two release cycles