$ git clone -n https://src.fedoraproject.org/rpms/shared-mime-info.git /var/lib/mock/f40-build-2233383-53375/root/chroot_tmpdir/scmroot/shared-mime-info
Cloning into '/var/lib/mock/f40-build-2233383-53375/root/chroot_tmpdir/scmroot/shared-mime-info'...
$ git fetch origin d268eb3f5ed12b6941f14a79b3be22355fa86969:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shared-mime-info
 * [new ref]         d268eb3f5ed12b6941f14a79b3be22355fa86969 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d268eb3 Fix build with libxml2-2.12.0