$ git clone -n https://src.fedoraproject.org/rpms/kexec-tools.git /var/lib/mock/f41-build-1021835-18037/root/chroot_tmpdir/scmroot/kexec-tools
Cloning into '/var/lib/mock/f41-build-1021835-18037/root/chroot_tmpdir/scmroot/kexec-tools'...
$ git fetch origin 6902d149d3f795658cfbd614e6caa0bc788d2f4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kexec-tools
 * [new ref]         6902d149d3f795658cfbd614e6caa0bc788d2f4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6902d14 Update to makedumpfile-1.7.5