$ git clone -n https://src.fedoraproject.org/rpms/krb5.git /var/lib/mock/f39-build-2257817-54331/root/chroot_tmpdir/scmroot/krb5
Cloning into '/var/lib/mock/f39-build-2257817-54331/root/chroot_tmpdir/scmroot/krb5'...
$ git fetch origin 1ed0e3a2d8c572e54bb3068ddc116a3d56034a99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krb5
 * [new ref]         1ed0e3a2d8c572e54bb3068ddc116a3d56034a99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
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Updating files: 100% (51/51), done.
HEAD is now at 1ed0e3a krb5 1.21.2-3