$ git clone -n https://src.fedoraproject.org/rpms/prometheus-simpleclient-java.git /var/lib/mock/f41-build-756815-13422/root/chroot_tmpdir/scmroot/prometheus-simpleclient-java
Cloning into '/var/lib/mock/f41-build-756815-13422/root/chroot_tmpdir/scmroot/prometheus-simpleclient-java'...
$ git fetch origin 0a3cb137cb27ae24be5ac656161222a834661cd4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/prometheus-simpleclient-java
 * [new ref]         0a3cb137cb27ae24be5ac656161222a834661cd4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a3cb13 Eliminate use of obsolete %patchN syntax (#2283636)