$ git clone -n https://src.fedoraproject.org/rpms/espresso.git /var/lib/mock/f41-build-side-1-2750162-31029/root/chroot_tmpdir/scmroot/espresso
Cloning into '/var/lib/mock/f41-build-side-1-2750162-31029/root/chroot_tmpdir/scmroot/espresso'...
$ git fetch origin 7ada91f2fcedbac5f1a642ab8ee9d0b4d0a10eca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/espresso
 * [new ref]         7ada91f2fcedbac5f1a642ab8ee9d0b4d0a10eca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ada91f convert GPLv3+ license to SPDX