$ git clone -n https://src.fedoraproject.org/rpms/systemd-boot.git /var/lib/mock/f39-build-2548027-61915/root/chroot_tmpdir/scmroot/systemd-boot
Cloning into '/var/lib/mock/f39-build-2548027-61915/root/chroot_tmpdir/scmroot/systemd-boot'...
$ git fetch origin be27f3147239d7f612595d609c222cfe06eff604:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/systemd-boot
 * [new ref]         be27f3147239d7f612595d609c222cfe06eff604 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be27f31 Add noautobuild file