$ git clone -n https://src.fedoraproject.org/rpms/rust-lv2-sys.git /var/lib/mock/f38-build-side-42-init-devel-1237668-30640/root/chroot_tmpdir/scmroot/rust-lv2-sys
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1237668-30640/root/chroot_tmpdir/scmroot/rust-lv2-sys'...
$ git fetch origin 26a8f312e1db606e18329235133b8a303dce272f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lv2-sys
 * [new ref]         26a8f312e1db606e18329235133b8a303dce272f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26a8f31 Initial import; Fixes: RHBZ#2224759