$ git clone -n https://src.fedoraproject.org/rpms/flamegraph.git /var/lib/mock/f45-build-9004-397/root/chroot_tmpdir/scmroot/flamegraph
Cloning into '/var/lib/mock/f45-build-9004-397/root/chroot_tmpdir/scmroot/flamegraph'...
$ git fetch origin 26b833a5c8e6c216b5597c0f44b7077ed0f47c32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flamegraph
 * [new ref]         26b833a5c8e6c216b5597c0f44b7077ed0f47c32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26b833a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild