$ git clone -n https://src.fedoraproject.org/rpms/kcachegrind.git /var/lib/mock/f39-build-1540606-36476/root/chroot_tmpdir/scmroot/kcachegrind
Cloning into '/var/lib/mock/f39-build-1540606-36476/root/chroot_tmpdir/scmroot/kcachegrind'...
$ git fetch origin b3f68fa333614f69a7e65a52b58ebe9757c1a52d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcachegrind
 * [new ref]         b3f68fa333614f69a7e65a52b58ebe9757c1a52d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3f68fa 23.08.2