$ git clone -n https://src.fedoraproject.org/rpms/libsecret.git /var/lib/mock/f40-build-2672757-67546/root/chroot_tmpdir/scmroot/libsecret
Cloning into '/var/lib/mock/f40-build-2672757-67546/root/chroot_tmpdir/scmroot/libsecret'...
$ git fetch origin 2cbbd09c77e18745723d6688716eed37288fd61e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsecret
 * [new ref]         2cbbd09c77e18745723d6688716eed37288fd61e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cbbd09 Update sources