$ git clone -n https://src.fedoraproject.org/rpms/virt-bootstrap.git /var/lib/mock/f41-build-side-1-2744362-30948/root/chroot_tmpdir/scmroot/virt-bootstrap
Cloning into '/var/lib/mock/f41-build-side-1-2744362-30948/root/chroot_tmpdir/scmroot/virt-bootstrap'...
$ git fetch origin 815ac08d6bcc90d995777689da1454fbcc28010f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/virt-bootstrap
 * [new ref]         815ac08d6bcc90d995777689da1454fbcc28010f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 815ac08 convert GPLv3+ license to SPDX