$ git clone -n https://src.fedoraproject.org/rpms/samba.git /var/lib/mock/f42-build-862262-170710/root/chroot_tmpdir/scmroot/samba
Cloning into '/var/lib/mock/f42-build-862262-170710/root/chroot_tmpdir/scmroot/samba'...
$ git fetch origin 6b05011701d1266df1099baf1daa6dd2c0d44f45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/samba
 * [new ref]         6b05011701d1266df1099baf1daa6dd2c0d44f45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b05011 Rebuild for ICU 76