$ git clone -n https://src.fedoraproject.org/rpms/perl-BSON.git /var/lib/mock/f41-build-side-1-2962361-35752/root/chroot_tmpdir/scmroot/perl-BSON
Cloning into '/var/lib/mock/f41-build-side-1-2962361-35752/root/chroot_tmpdir/scmroot/perl-BSON'...
$ git fetch origin 41b437ba73fce05f94a1c3a238adb175b9f8fe57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-BSON
 * [new ref]         41b437ba73fce05f94a1c3a238adb175b9f8fe57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41b437b convert ASL 2.0 license to SPDX