$ git clone -n https://src.fedoraproject.org/rpms/grepcidr.git /var/lib/mock/f41-build-side-1-3076632-38892/root/chroot_tmpdir/scmroot/grepcidr
Cloning into '/var/lib/mock/f41-build-side-1-3076632-38892/root/chroot_tmpdir/scmroot/grepcidr'...
$ git fetch origin de121e63e16963881bd376097ac84734b75e8c59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/grepcidr
 * [new ref]         de121e63e16963881bd376097ac84734b75e8c59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de121e6 convert GPLv2+ license to SPDX